git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/delete.c

   1 /* delete.c - bdb backend delete routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_delete(
  18         BackendDB       *be,
  19         Connection      *conn,
  20         Operation       *op,
  21         const char      *dn,
  22         const char      *ndn
  23 )
  24 {
  25         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  26         Entry   *matched;
  27         char    *pdn = NULL;
  28         Entry   *e, *p = NULL;
  29         int     rc;
  30         const char *text;
  31         int             manageDSAit = get_manageDSAit( op );
  32         AttributeDescription *children = slap_schema.si_ad_children;
  33         DB_TXN          *ltid = NULL;
  34         struct bdb_op_info opinfo;
  35
  36         Debug( LDAP_DEBUG_ARGS, "==> bdb_delete: %s\n", dn, 0, 0 );
  37
  38         if( 0 ) {
  39 retry:  /* transaction retry */
  40                 Debug( LDAP_DEBUG_TRACE, "==> bdb_delete: retrying...\n", 0, 0, 0 );
  41                 rc = txn_abort( ltid );
  42                 ltid = NULL;
  43                 op->o_private = NULL;
  44                 if( rc != 0 ) {
  45                         rc = LDAP_OTHER;
  46                         text = "internal error";
  47                         goto return_results;
  48                 }
  49         }
  50
  51         if( bdb->bi_txn ) {
  52                 /* begin transaction */
  53                 rc = txn_begin( bdb->bi_dbenv, NULL, &ltid,
  54                         bdb->bi_db_opflags );
  55                 text = NULL;
  56                 if( rc != 0 ) {
  57                         Debug( LDAP_DEBUG_TRACE,
  58                                 "bdb_delete: txn_begin failed: %s (%d)\n",
  59                                 db_strerror(rc), rc, 0 );
  60                         rc = LDAP_OTHER;
  61                         text = "internal error";
  62                         goto return_results;
  63                 }
  64         }
  65
  66         opinfo.boi_bdb = be;
  67         opinfo.boi_txn = ltid;
  68         opinfo.boi_err = 0;
  69         op->o_private = &opinfo;
  70
  71         /* get entry for read/modify/write */
  72         rc = bdb_dn2entry( be, ltid, ndn, &e, &matched, DB_RMW );
  73
  74         switch( rc ) {
  75         case 0:
  76         case DB_NOTFOUND:
  77                 break;
  78         case DB_LOCK_DEADLOCK:
  79         case DB_LOCK_NOTGRANTED:
  80                 goto retry;
  81         default:
  82                 rc = LDAP_OTHER;
  83                 text = "internal error";
  84                 goto return_results;
  85         }
  86
  87         if ( e == NULL ) {
  88                 char *matched_dn = NULL;
  89                 struct berval **refs;
  90
  91                 Debug( LDAP_DEBUG_ARGS,
  92                         "<=- bdb_delete: no such object %s\n",
  93                         dn, 0, 0);
  94
  95                 if ( matched != NULL ) {
  96                         matched_dn = ch_strdup( matched->e_dn );
  97                         refs = is_entry_referral( matched )
  98                                 ? get_entry_referrals( be, conn, op, matched,
  99                                         dn, LDAP_SCOPE_DEFAULT )
 100                                 : NULL;
 101                         bdb_entry_return( be, matched );
 102                         matched = NULL;
 103
 104                 } else {
 105                         refs = referral_rewrite( default_referral,
 106                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 107                 }
 108
 109                 send_ldap_result( conn, op, LDAP_REFERRAL,
 110                         matched_dn, NULL, refs, NULL );
 111
 112                 ber_bvecfree( refs );
 113                 free( matched_dn );
 114
 115                 rc = -1;
 116                 goto done;
 117         }
 118
 119         pdn = dn_parent( be, ndn );
 120
 121         if( pdn != NULL && *pdn != '\0' ) {
 122                 /* get parent */
 123                 rc = bdb_dn2entry( be, ltid, pdn, &p, NULL, 0 );
 124
 125                 switch( rc ) {
 126                 case 0:
 127                 case DB_NOTFOUND:
 128                         break;
 129                 case DB_LOCK_DEADLOCK:
 130                 case DB_LOCK_NOTGRANTED:
 131                         goto retry;
 132                 default:
 133                         rc = LDAP_OTHER;
 134                         text = "internal error";
 135                         goto return_results;
 136                 }
 137
 138                 if( p == NULL) {
 139                         Debug( LDAP_DEBUG_TRACE,
 140                                 "<=- bdb_delete: parent does not exist\n",
 141                                 0, 0, 0);
 142                         rc = LDAP_OTHER;
 143                         text = "could not locate parent of entry";
 144                         goto return_results;
 145                 }
 146
 147                 /* check parent for "children" acl */
 148                 rc = access_allowed( be, conn, op, p,
 149                         children, NULL, ACL_WRITE );
 150
 151                 bdb_entry_return( be, p );
 152                 p = NULL;
 153
 154                 if ( !rc  ) {
 155                         Debug( LDAP_DEBUG_TRACE,
 156                                 "<=- bdb_delete: no access to parent\n",
 157                                 0, 0, 0 );
 158                         rc = LDAP_INSUFFICIENT_ACCESS;
 159                         goto return_results;
 160                 }
 161
 162         } else {
 163                 /* no parent, must be root to delete */
 164                 if( ! be_isroot( be, op->o_ndn ) ) {
 165                         if ( be_issuffix( be, "" ) || be_isupdate( be, op->o_ndn ) ) {
 166                                 p = (Entry *)&slap_entry_root;
 167
 168                                 /* check parent for "children" acl */
 169                                 rc = access_allowed( be, conn, op, p,
 170                                         children, NULL, ACL_WRITE );
 171                                 p = NULL;
 172
 173                                 if ( !rc  ) {
 174                                         Debug( LDAP_DEBUG_TRACE,
 175                                                 "<=- bdb_delete: no access "
 176                                                 "to parent\n", 0, 0, 0 );
 177                                         rc = LDAP_INSUFFICIENT_ACCESS;
 178                                         goto return_results;
 179                                 }
 180
 181                         } else {
 182                                 Debug( LDAP_DEBUG_TRACE,
 183                                         "<=- bdb_delete: no parent "
 184                                         "and not root\n", 0, 0, 0);
 185                                 rc = LDAP_INSUFFICIENT_ACCESS;
 186                                 goto return_results;
 187                         }
 188                 }
 189         }
 190
 191         if ( !manageDSAit && is_entry_referral( e ) ) {
 192                 /* parent is a referral, don't allow add */
 193                 /* parent is an alias, don't allow add */
 194                 struct berval **refs = get_entry_referrals( be,
 195                         conn, op, e, dn, LDAP_SCOPE_DEFAULT );
 196
 197                 Debug( LDAP_DEBUG_TRACE,
 198                         "bdb_delete: entry is referral\n",
 199                         0, 0, 0 );
 200
 201                 send_ldap_result( conn, op, LDAP_REFERRAL,
 202                         e->e_dn, NULL, refs, NULL );
 203
 204                 ber_bvecfree( refs );
 205
 206                 rc = 1;
 207                 goto done;
 208         }
 209
 210         rc = bdb_dn2id_children( be, ltid, e->e_ndn );
 211         if( rc != DB_NOTFOUND ) {
 212                 switch( rc ) {
 213                 case DB_LOCK_DEADLOCK:
 214                 case DB_LOCK_NOTGRANTED:
 215                         goto retry;
 216                 case 0:
 217                         Debug(LDAP_DEBUG_ARGS,
 218                                 "<=- bdb_delete: non-leaf %s\n",
 219                                 dn, 0, 0);
 220                         rc = LDAP_NOT_ALLOWED_ON_NONLEAF;
 221                         text = "subtree delete not supported";
 222                         break;
 223                 default:
 224                         Debug(LDAP_DEBUG_ARGS,
 225                                 "<=- bdb_delete: has_children failed: %s (%d)\n",
 226                                 db_strerror(rc), rc, 0 );
 227                         rc = LDAP_OTHER;
 228                         text = "internal error";
 229                 }
 230                 goto return_results;
 231         }
 232
 233         /* delete from dn2id */
 234         rc = bdb_dn2id_delete( be, ltid, pdn, e->e_ndn, e->e_id );
 235         if ( rc != 0 ) {
 236                 switch( rc ) {
 237                 case DB_LOCK_DEADLOCK:
 238                 case DB_LOCK_NOTGRANTED:
 239                         goto retry;
 240                 default:
 241                         rc = LDAP_OTHER;
 242                 }
 243                 Debug(LDAP_DEBUG_ARGS,
 244                         "<=- bdb_delete: dn2id failed: %s (%d)\n",
 245                         db_strerror(rc), rc, 0 );
 246                 text = "DN index delete failed";
 247                 goto return_results;
 248         }
 249
 250         /* delete indices for old attributes */
 251         rc = bdb_index_entry_del( be, ltid, e, e->e_attrs );
 252         if ( rc != LDAP_SUCCESS ) {
 253                 switch( rc ) {
 254                 case DB_LOCK_DEADLOCK:
 255                 case DB_LOCK_NOTGRANTED:
 256                         goto retry;
 257                 default:
 258                         rc = LDAP_OTHER;
 259                 }
 260                 Debug( LDAP_DEBUG_ANY, "entry index delete failed!\n",
 261                         0, 0, 0 );
 262                 text = "entry index delete failed";
 263                 goto return_results;
 264         }
 265
 266         /* delete from id2entry */
 267         rc = bdb_id2entry_delete( be, ltid, e->e_id );
 268         if ( rc != 0 ) {
 269                 switch( rc ) {
 270                 case DB_LOCK_DEADLOCK:
 271                 case DB_LOCK_NOTGRANTED:
 272                         goto retry;
 273                 default:
 274                         rc = LDAP_OTHER;
 275                 }
 276                 Debug(LDAP_DEBUG_ARGS,
 277                         "<=- bdb_delete: id2entry failed: %s (%d)\n",
 278                         db_strerror(rc), rc, 0 );
 279                 text = "entry delete failed";
 280                 goto return_results;
 281         }
 282
 283
 284 #if 0   /* Do we want to reclaim deleted IDs? */
 285         ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
 286         if ( e->e_id == bdb->bi_lastid ) {
 287                 bdb_last_id( be, ltid );
 288         }
 289         ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
 290 #endif
 291
 292         if( bdb->bi_txn ) {
 293                 rc = txn_commit( ltid, 0 );
 294         }
 295         ltid = NULL;
 296         op->o_private = NULL;
 297
 298         if( rc != 0 ) {
 299                 Debug( LDAP_DEBUG_TRACE,
 300                         "bdb_delete: txn_commit failed: %s (%d)\n",
 301                         db_strerror(rc), rc, 0 );
 302                 rc = LDAP_OTHER;
 303                 text = "commit failed";
 304
 305         } else {
 306                 Debug( LDAP_DEBUG_TRACE,
 307                         "bdb_delete: deleted id=%08lx dn=\"%s\"\n",
 308                         e->e_id, e->e_dn, 0 );
 309                 rc = LDAP_SUCCESS;
 310                 text = NULL;
 311         }
 312
 313 return_results:
 314         send_ldap_result( conn, op, LDAP_SUCCESS,
 315                 NULL, text, NULL, NULL );
 316
 317         if(rc == LDAP_SUCCESS && bdb->bi_txn_cp ) {
 318                 ldap_pvt_thread_yield();
 319                 txn_checkpoint( bdb->bi_dbenv,
 320                         bdb->bi_txn_cp_kbyte, bdb->bi_txn_cp_min, 0 );
 321         }
 322
 323 done:
 324         if( pdn != NULL ) {
 325                 free( pdn );
 326         }
 327
 328         /* free entry */
 329         if( e != NULL ) {
 330                 bdb_entry_return( be, e );
 331         }
 332
 333         if( ltid != NULL ) {
 334                 txn_abort( ltid );
 335                 op->o_private = NULL;
 336         }
 337
 338         return rc;
 339 }